Fastening-inserting machine



April 25, 1939. H, EELY 2,155,566

FASTENING INSERTING MACHINE Filed Aug. 10, 1937 2 Sheets-Sheet 1 Fig.1.

/M/E/VTUQ @1646 U32. M4J1. 4% M 6544 April 25, 1939.

T. H. SEELY FASTENING INSERTING MACHINE Filed Aug. 10, 1937 2 Sheets-Sheet 2 Patented Apr. 25, 1939 UNITED STATES PATENT OFFKIE FASTENING-INSERTING MACHINE Application August 10, 1937, Serial No. 158,387

39 Claims.

This invention relates to machines by which fastenings, such as nails, may be inserted to secure together work-pieces. An example of work for which this machine is especially adapted is the attachment of heels to shoes.

An object of this invention is to provide for the insertion of the fastenings to a definite depth in the work. This object I attain by combining with a Work-support or jack, fastening-inserting lo mechanism, fluid-pressure mechanism for imparting to the inserting mechanism its operating movement and means movable under the power of the machine for stopping the operating movement at a predetermined point. This stopping 16 means preferably forms a part of the fluid-pressure mechanism, it relieving the operating pressure after the desired movement of the inserting mechanism. The fluid-pressure mechanism may have inner and outer movable members, as a pis- 20 ton and cylinder, one of these carrying fasteningdrivers and the other being moved to produce pressure to actuate the drivers. In these members are passages which are movable into registration to relieve the pressure. The travel of the drivers and therefore the depth of insertion of the fastenings is thereby determined accurately.

If the inside nailing of heels is being performed,

the heads of the nails may be at all times properly sunk in the insole. Regardless of this con- 30 trolled extent of fastening-insertion, I prefer to utilize fluid-pressure mechanism to actuate both the inserting mechanism and the mechanism by which the work is held under pressure for such insertion. This fluid-pressure actuation may be 35 effected by a unitary member which not only operates the inserting mechanism but also the work-pressure mechanism, the latter having an abutment by which the work is clamped on its support. The actuating member may consist of 40 an intermediate cylinder movable between the piston and cylinder previously mentioned and having the combined functions of a piston and cylinder. The fluid pressure thus applied to the work-pressure mechanism is preferably greater 45 than the inserting force, to provide adequate resistance to the displacement of the work during the operations upon it. To insure the maintenance of this work-pressure, without reference to the manner in which the fluid pressure is 50 being applied to the inserting mechanism, I furnish' means for retaining the work-pressure mechanism in the position to which it is moved by the fluid-pressure mechanism. This is herein shown as accomplished by a valve, which, when 55 the inserting mechanism and work-pressure mechanism are moved oppositely by the application of the fluid pressure, acts to retain this upon the latter mechanism, even though upon the former it has ceased.

Another object of the invention is to provide 5 for the effective insertion of fastenings in successive groups, whereby a less inserting force may be applied at any one time. There is consequently less tendency to displace the work from its support, reducing the necessary clamping force and avoiding the danger of injuring the Work, as by crushing heels. Further, the strain upon the machine is lessened. To this end, I employ plural inserting mechanisms, actuating one from a movable power member, as a rotatable shaft, while the other is actuated by fluid-pressure mechanism. These mechanisms are made effective alternately to divide the stresses, as just mentioned. As herein presented, the fluid-pressure mechanism receives power through the inserting mechanism, operated directly from the power member. This fluid-pressure mechanism also preferably actuates the work-pressure mechanism. The fluid-pressure mechanism may utilize the co-operating piston, cylinders and pressure-controlling valve already referred to.

One of the several forms which my invention may assume is illustrated in the accompanying drawings, in which Fig. 1 is a broken front elevation of the appa- 3o ratus, and

Fig. 2, a central, vertical section through it.

This invention, as herein disclosed, has some features similar to those included in the machine of Letters Patent of the United States No. 2,033,158, Standish, March 10, 1936. These will be but briefly stated and are as follows: Upon a frame ll] a jack !2 for supporting a shoe is mounted, this having, opening through its top, vertical driver-passages l4. Guided in the frame 4 at opposite sides of the jack are rods l6, l6, having secured to their upper extremities a yoke l8 carrying a pressure-abutment 20 for contact with the tread-surface of a heel H to be attached to a jacked shoe S. The lower ends of the side-rods are joined by a transversely extending member 22, which is connected by a link 24 to a treadle 26 fulcrumed at 28 at the rear of the frame and held normally raised by a spring 29. Journaled horizontally in the frame is a driving shaft 30 rotated by power applied through a clutch 32 from a pulley 34. Depression of the treadle 10wers the abutment into engagement with the work, whereupon the fulcrum shifts from 28 to the link 24, and the rear of the treadle rises to trip the clutch 32 through a link 35. This effects, as will now be described, the driving of nails contained in the passages I4.

Depending from the frame below the forward end of the shaft 38 is a bracket 36 carrying a stationary cylinder 38 vertically alined with the work-supporting surface of the jack I2. The member 22 has rising from it a wall 40 furnishing a receptacle for a fluid to be employed. Preferably, a liquid, as oil, is used. The receptacle has a reduced portion extending downwardly and forming a cylinder 42 fitting about a stationary piston 44 depending from the center of the cylinder 38. Through this piston is an axial passage 46 connecting the cylinder 42 and a casing 48 extending transversely of the lower portion of the cylinder 38. In the casing is movable a plunger-valve 56, which may either join the passage 46 with a port 52 at the bottom of the cylinder 38 through a circumferential groove surrounding a central reduced portion 54, to permit liquid to flow between the cylinders 38 and 42, or may close this port to lock the liquid in thecylinder 42. The action of the valve will be described later.

Movable vertically in the cylinder 38 is a tubular piston 60 which has rising from it a yoke 62. Fitting within the piston 60, which serves as a cylinder for it, is a central piston 64 provided with an offset upward extension 66 having an end-portion 6'I' guided in the frame, and through which passes a rod 68 supported upon the yoke 62. The area of the lower end of the piston 64 is preferably less than that of the piston 44. The extension 66 and the rod 68 have respectively mounted upon them a plate 10 and a plate "I2. The plate ID carries, movable in the group of the jack-passages I4, drivers I4, which may be four in number for the insertion of nails or other fastenings resting upon their upper extremities. The plate 72 may have three drivers "I6 in another group of the passages I4, there thus being provided for the insertion of seven fastenings in all. Both the drivers and driverplates may have the usual threaded adjustments to allow the relation of the upper ends of the drivers to the jack-top to be varied. Interposed between an adjusting collar 'I'I movable upon the frame below the jack and a washer I8 resting upon a shoulder formed upon the frame, is a compression-spring 80. This spring resists the movement of the piston 64 as it rises and returns the drivers 14 to their normal relation, with their upper extremities below the jack-top.

The piston 64, the piston-cylinder 60 and the cylinder 38 are provided with means by which are controlled the passages conducting the liquid between the cylinder 42, the piston-cylinder 60, the cylinder 38 and the receptacle 4!). At 82, the piston 64 has spaced projections normally bearing upon the bottom of the cylinder 38, permitting movement of the liquid between the port 52 and the interior of said cylinder. Through the lower portion of the piston 64 is an axial passage 8.4 connected through the body of the piston with a circular groove 86 therein. On relative movement of the elements 60 and '64, the groove will come into registration with a passage 88 through the wall of the piston-cylinder 30, while this is in registration with a passage 99 through the cylinder 38 and opening into the receptacle 40. The bottom of the piston-cylinder is transversely grooved at 92, these grooves at the outer ends normally connecting with ports 94 in the wall of the cylinder 38.

The piston-cylinder 60 is reciprocated in the chamber formed by the co-operating elements, it thereby applying forces to both actuate its drivers I4 for the insertion of fastenings which they carry and to operate the piston 64 for the insertion of fastenings upon its drivers I6. The movement of the piston-cylinder is effected through connection to the shaft 30. This connection is shown as consisting of a transverse slot 95 in the upper portion of the yoke 62, the slot receiving a roll 98 rotatable upon a crankpin IDIJ revolved by the shaft 30. In addition to reciprocating the piston-cylinder and its driverassembly, the revolution of the crank-pin may be utilized to actuate the valve 59. For this purpose, the crank-pin is linked at I 62 to a lever I64 fulcrumed upon the fixed cylinder 38, the lever being joined at its lower extremity to the valve by a link I06. The connection of the link I82 to the crank-pin is preferably through an eccentric bushing I08, which may be clamped in the link in different angular positions to vary the timing of the valve.

At the beginning of an operating cycle, the elements are positioned as they appear in the drawings. The pressure-abutment 20 and the treadle 28 are raised by the spring 29. The piston 64 and its drivers I4 are lowered by the spring 80 and by gravity, the movement of the piston being limited by contact with the cylinder 38. The crank-pin I08 has not at this time reached its lowest position, though it has so depressed the piston-cylinder 60 that the drivers I4 give spaces above their ends to receive in the passages I4 the fastenings to be inserted. The valve 50 is open; the grooves 92 and the ports 94 are joined through narrow spaces at H0; and the groove 8-6 and the passage 88 are out of registration. Under these conditions, there is free communication fromthe receptacle 40 through the ports 94, openings H0, grooves 92, cylinder 38, port 52, open valve 50 and passage 46 into the interior the driven pulley 34 to the shaft 30 for a single.

rotation of the latter. The first action is to fully lower the piston-cylinder 68 through the action of the roll 98. The openings at H0 at once close, trapping the body of liquid which fills the cylinders 38 and 42 and the connected passages. Consequently, as the descent of the member 69 continues, a pressure is generated in the liquid, which acts upon both the cylinder 42 and the piston 64. The former is forced down and with it the connected abutment 20. At the same time, the piston, 34 is elevated, so the drivers '54 insert their fournails in the work. Because this movement ofv the piston is resisted by the Weight of the parts lifted and by the spring 80 prior to the reaction created as the nails penetrate the shoe-parts, clamping pressure will be'pla-ced upon the work by the abutment 20 before the insertion of the nails begins. With all the opposing forces, that exerted by theabutment in its clamping action will substantially exceed that applied for driving the nails and which tends to displace the work. Moreover, the excess of area of the piston 44 over that of the piston 64 augments the holddown pressure upon the heel. As a result of all this, the retention of the insole of the shoe firmly against the jack-top is assured. The nail-driving continues until the cylinder-groove 86 and the piston-cylinder-passage 88 come into registration in the opposite movement of the elements. The relation of the groove and passage to each other is such that, considering the rate of travel' of the elements in which they are formed, this registration will occur when the upper extremities of the drivers 14 have reached points at which the nail-heads are properly sunk in the insole. The connection between the groove and passage relieves the pressure upon the piston 64, the liquid being released through the passage 90, and the piston-driver-assembly is restored to normal by the spring 80. Just at this time, the crank-pin I00 shifts the valve 50, so the port 52 is closed. This locks the compressed liquid in the cylinder 42, and full clamping pressure is maintained upon the work by the abutment 20. When this occurs, the crank-pin is passing the lower center in its revolution, so the valve is shifted at the maximum speed. Now, the crankpin begins to rise, the roll 98 elevates the pistoncylinder 60, and the drivers "[6 insert the three nails which rest upon them. The stroke imparted when the crank-pin crosses the upper center is sufficient to drive the nails to the desired depth. As the piston-cylinder is being lowered with the drivers 16 during the completion of revolution of the crank-pin, the valve 50 is opened, and the abutment l8, treadle 26 and the connecting elements are returned to normal by the spring 29. The heeled shoe may be removed from the jack, and the machine is ready for the succeeding operation.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the Unite-d States is:

1. In a fastening-inserting machine, a worksupport, fastening-inserting mechanism co-operating therewith, fluid-pressure mechanism for imparting to the inserting mechanism its operating movement, and means movable under the power of the machine for stopping such operating movement at a predetermined point.

2. In a fastening-inserting machine, a worksupport, fastening-inserting mechanism co-operating therewith, fluid-pressure mechanism for imparting to the inserting mechanism its operating movement, and means forming a part of an element to which fluid-pressure is applied to produce the operating movement for stopping such operating movement at a predetermined point.

3. In a fastening-inserting machine, a worksupport, fastening-inserting mechanism co-operating therewith, and fluid-pressure mechanism for imparting to the inserting mechanism its operating movement and including means for re lieving the pressure after a predetermined travel of the inserting mechanism.

4. In a fastening-inserting machine, a Worksupport, fastening-drivers co-operating therewith, fluid-pressure mechanism. having inner and outer movable members, one of said members carrying the drivers, and means for moving the other member to produce pressure to actuate the drivers.

5. In a fastening-inserting machine, a worksupport, fastening-drivers co-operating therewith, fluid-pressure mechanism having inner and outer movable members, one of said members carrying the drivers, and means for moving the other member to produce pressure to actuate the drivers, there being means made efiective in the movement of the members for relieving the pressure.

6. In a fastening-inserting machine, a worksupport, fastening-drivers co-operating therewith, fluid-pressure mechanism having inner and outer movable members, one of said members carrying the drivers, and means for moving the other member to produce pressure to actuate the drivers, the members having passages movable into registration to relieve the pressure.

7. In a heel-attaching machine, a jack, drivers movable in the jack, a piston by which the drivers are carried, an inner cylinder surrounding the piston, an outer cylinder surrounding the inner cylinder, and means for moving the inner cylinder to create in the outer cylinder pressure to actuate the drivers.

8. In a heel-attaching machine, a jack, drivers movable in the jack, a piston by which the drivers are carried, an inner cylinder surrounding the piston, an outer cylinder surrounding the inner cylinder, and means for moving the inner cylinder to move the piston and thereby actuate the drivers, the inner cylinder and piston having passages which may come into registration during the movement.

9. In a fastening-inserting machine, movable work-pressing mechanism, fasteningdnserting mechanism movable in co-operation therewith, fluid-pressure mechanism arranged to impart movement to both the work-pressing mechanism and the inserting mechanism, and a member movable by the operator to apply preliminary pressure to the work and thereafter to control the fluid pressure to produce the application of final pressure by the work-pressing mechanism and the operation of the inserting mechanism.

10. In a heel-attaching machine, a shoe-sup porting jack, fastening-drivers movable therein, a heel-engaging member co-operating with the jack, said member and jack being relatively movable, fluid-pressure mechanism arranged to produce such relative movement and to actuate the drivers, and a unitary member movable by the operator to control the fluid-pressure mechanism to clamp a shoe and heel upon the jack and thereafter to cause the drivers to insert the fastenings through the heel-seat of the shoe into the heel.

11. In a heel-attaching machine, a shoe-supporting jack, fastening-drivers movable therein, a heel-engaging member movable toward and from the jack, a treadle by which the heelengaging member may be moved to apply preliminary pressure to the work, fluid-pressure mechanism arranged to impart movement to the heel-engaging member and drivers, and means connected to the treadle for controlling the fluidpressure mechanism to actuate the heel-engaging member to apply final pressure to the Work and thereafter to cause the drivers to insert the fastenings through the heel-seat of the shoe into the heel.

12, In a fastening-inserting machine, a worksupport, fastening-inserting mechanism and work-pressure mechanism movable in co-operation therewith, and fluid-pressure mechanism having a member movable to impart movement simultaneously to both the inserting mechanism and work-pressure mechanism.

13. In a fastening-inserting machine, a Work support, fastening-inserting mechanism and work-pressure mechanism movable in co-operation therewith, fluid-pressure mechanism having a member movable to create pressure, and members movable oppositely by such pressure and connected to the inserting mechanism and workpressure mechanism.

14. In a fastening-inserting machine, a worksupport, fastening-inserting mechanism and work-pressure mechanism movable in co-operation therewith, fluid-pressure mechanism having a member movable to create pressure, and members movable oppositely by such pressure and connected to the inserting mechanism and workpressure mechanism, said members being arranged to apply greater fluid-pressure to the work-pressure mechanism than to the inserting mechanism.

15. In a fastening-inserting machine, a worksupport, fastening-inserting mechanism and work-pressure mechanism movable in co-operation therewith, fluid-pressure mechanism having a member movable to create pressure, members movable oppositely by such pressure and connected to the inserting mechanism and workpressure mechanism, and means for retaining the work-pressure mechanism in the position to which it is thus moved.

16. In a fastening-inserting machine, a worksupport, fastening-inserting mechanism and work-pressure mechanism movable in co-operation therewith, and fluid-pressure mechanism arranged to impart movement to both the inserting mechanism and the work-pressure mechanism, said fluid-pressure mechanism having means for limiting the travel of the inserting mechanism and for locking the work-pressure mechanism in the position to which it is moved.

17. In a fastening-inserting machine, fastening-inserting mechanism, work-pressure mechanism, members connected respectively to the inserting mechanism and work-pressure mechanism and co-operating in the formation of a fluid-pressure chamber, and means for creating pressure in the chamber.

18. In a fastening-inserting machine, a worksupport, fastening-inserting mechanism and work-pressure mechanism movable in co-operation therewith, fluid-pressure mechanism having oppositely movable members respectively connected to the inserting mechanism and workpressure mechanism, and a member movable in contact with the oppositely movable members to create the pressure and thereby such opposite movement.

9. In a fastening-inserting machine, a worksuppcrt, fastening-inserting mechanism and work-pressure mechanism movable in co-operation therewith, fluid-pressure mechanism having oppositely movable members respectively connected to the inserting mechanism and workpressure mechanism, a member movable in com tact with the oppositely movable members to create fluid pressure and thereby such opposite movement, and a valve by which the pressure may be retained upon the workepressure mechanism.

20. In a heel-attaching machine, a jack, drivers movable in the jack, a movable work-pressureabutment co-operating with the jack, a stationary cylinder and piston, a piston movable in the cylinder and carrying the drivers, a cylinder movable about the stationary piston and connected to the abutment, and means for creating pressure in the stationary cylinder and communieating it to both the movable piston and movable cylinder.

21. In a heel-attaching machine, a jack, driversmovable in the jack, a movable work-pressureabutment co-operating with the jack, a stationary cylinder and piston, a piston movable in. the cylinder and carrying the drivers, a cylinder movable about the stationary piston and connected to the abutment, there being a passage between able about the stationary piston and connected.

to the abutment, there being a passagebetween the cylinders through the stationary piston, a

valve controlling the passage, and a piston-cylinder movable in the stationary cylinder and in which the piston moves.

23. In a heel-attaching machine, a jack, drivers movable in the jack, a movablework-pressureabutment co-operating with the jack, a stationary cylinder and piston, a piston movable in.

the cylinder and carrying the drivers, a cylinder movable about the stationary piston and connected to the abutment, and means for creating pressure in the stationary cylinder and communicating it to both the movable piston and movable cylinder, the stationary piston having a larger area subject to pressure than has the movable piston.

24. In a fastening-inserting machine, a plurality of fastening-inserting mechanisms, a mov-.

able power member, connections to the member for actuating one of the inserting mechanisms, and fluid-pressure mechanism for actuating another of the inserting mechanisms.

25. In a fastening-inserting machine, a plurality of fastening-inserting mechanisms, a movable power member, connections to the member for actuating one of the inserting mechanisms, and fluid-pressure mechanism receiving power through said inserting mechanism for actuating another of the inserting mechanisms.

26. In a fastening-inserting machine, a plurality of fastening-inserting mechanisms, workpressure mechanism, a movable power member, connections to the member for actuating one of the inserting mechanisms, and fluid-pressure mechanism for actuating another of the inserting mechanisms and the work-pressure mechanism. 27. In a fastening-inserting machine, a worksupport, a fastening-driver co-operating therewith, a reciprocatory driver-carrier, a powershaft by which the driver-carrier is reciprocated, a second carrier having a driver co-operating with the work-support, and a co-operating cylinder and piston respectively connected to the driver-carriers, movement of one of the cylinder and piston elementstransmitting power to the other.

28. In a fastening-inserting machine, a worksupport, a fastening-driver co-operating therewith, a reciprocatory driver-carrier, a powershaft by which the driver-carrier is reciprocated, a second carrier having a driver co-operating with the work-support, a co-operating cylinder and piston respectively connected to the driver-carriers, and a cylinder in which said cylinder and piston operate.

29. In a fastening-inserting machine, a plupressure mechanism, a movable power member, connections to the member for actuating one of the inserting mechanisms, fluid-pressure mechanism for actuating another of the inserting mechanisms and the work-pressure mechanism, and a valve for controlling the fluid and thereby the action of the work-pressure mechanism.

30. In a fastening-inserting machine, a plurality of fastening-inserting mechanisms, workpressure mechanism, a movable power member, connections to the member for actuating one of the inserting mechanisms, fluid-pressure mechanism for actuating another of the inserting mechanisms and the work-pressure mechanism, a valve for controlling the fluid and thereby the action of the work-pressure mechanism, and connections to the power member for operatin the valve.

31. In a heel-attaching machine, a jack, two sets of drivers movable therein, a power-shaft provided with a crank, a carrier for one set of drivers reciprocated by the crank, a carrier for the other set of drivers, and a co-operating piston and cylinder for transmitting movement of the crankactuated carrier to such other carrier.

32. In a heel-attaching machine, a jack, two sets of drivers movable therein, a heel-abutment movable toward and from the jack, a power-shaft provided with a crank, a carrier for one set of drivers reciprocated by the crank, a carrier for the other set of drivers, a co-operating piston and cylinder for transmitting by fluid pressure movement of the crank-actuated carrier to such other carrier, a second piston and cylinder also receiving fluid pressure and actuating the heel-abutment, a valve for controlling the fluid pressure to the last-mentioned piston and cylinder, and connections to the crank for actuating the valve.

33. In a heel-attaching machine, a jack, two sets of drivers movable therein, a heel-abutment movable toward and from the jack, a power-shaft provided with. a crank, a carrier for one set of drivers reciprocated by the crank, a carrier for the other set of drivers, a co-operating piston and cylinder for transmitting by fluid pressure movement of the crank-actuated carrier to such other carrier, a second piston and cylinder also receiving fluid pressure and actuating the heel-abutment, a valve for controlling the fluid pressure to the last-mentioned piston and cylinder, and connections to the crank for actuating the valve and including an eccentric for varying the timing of said valve.

34. In a heel-attaching machine, a frame, a jack mounted thereon, drivers reciprocating in the jack, side-rods movable in the frame, a heelabutment attached to the side-rods and co-operating with the jack, a cylinder carried by the siderods, a stationary cylinder mounted upon the frame and having a piston-portion fitting within the side-rod-cylinder and in which is the passage joining the cylinders, a piston movable in the stationary cylinder and carrying the drivers, and means for creating pressure in said stationary cylinder.

35. In a heel-attaching machine, a frame, a.

jack mounted thereon, drivers reciprocating in the jack, side-rods movable in the frame, a heel-abutment attached to the side-rods and co-operating with the jack, a cylinder carried by the side-rods, a stationary cylinder mounted upon the frame and having a piston-portion fitting within the side-rod-cylinder and in which is the passage joining the cylinders, a piston movable in the stationary cylinder and carrying the drivers, means for creating pressure in said stationary cylinder, and a valve movable in the passage between the cylinders.

36. In a heel-attaching machine, a frame, a jack mounted thereon, drivers reciprocating in the jack, side-rods movable in the frame, a heel-abutment attached to the side-rods and co-operating with the jack, a cylinder carried by the side-rods, a stationary cylinder mounted upon the frame and having a piston-portion fitting within the siderod-cylinder and in which is the passage joining the cylinders, a piston movable in the stationary cylinder and carrying the drivers, and a pistoncylinder movable between the stationary cylinder and the movable piston.

37. In a heel-attaching machine, a frame, a jack mounted thereon, drivers reciprocating in the jack, side-rods movable in the frame, a heelabutment attached to the side-rods and co-operating with the jack, a cylinder carried by the siderods, a stationary cylinder mounted upon the frame and having a piston-portion fitting within the side-rod-cylinder and in which is the passage joining the cylinders, a piston movable in the stationary cylinder and carrying the drivers, and a piston-cylinder movable between the stationary cylinder and the movable piston, said pistoncylinder and stationary cylinder having means which controls travel of the movable piston.

38. In a heel-attaching machine, a frame, a jack mounted thereon, drivers reciprocating in the jack, side-rods movable in the frame, a heel-abutment attached to the side-rods and co-operating with the jack, a cylinder carried by the side-rods, a stationary cylinder mounted upon the frame and having a piston-portion fitting within the siderod-cylinder and in which is the passage joining the cylinders, a piston movable in the stationary cylinder and carrying the drivers, a piston-cylinder movable between the stationary cylinder and the movable piston, a rotatable power-shaft, and connections to the power-shaft for moving the piston-cylinder.

39. In a heel-attaching machine, a frame, a jack mounted thereon, drivers reciprocating in the jack, side-rods movable in the frame, a heelabutment attached to the side-rods and co-operating with the jack, a cylinder carried by the siderods, a stationary cylinder mounted upon the frame and having a piston-portion fitting within the side-rod-cylinder and in which is the passage joining the cylinders, a piston movable in the stationary cylinder and carrying the drivers, a piston-cylinder movable between the stationary cylinder and the movable piston, a valve movable in the passage, a rotatable power-shaft, connections to the power-shaft for moving the piston cylinder, and connections to the power-shaft for actuating the valve.

THOMAS H. SEELY. 

